Exploring new applications of portable X-ray fluorescence spectroscopy to the study of rock art, we report the determination of paint layer stratigraphy based upon measured elemental levels. In Lower Pecos rock art, we were able to discern when red and yellow paints superimpose black paints based on elevated levels of manganese. This ability to see underneath paint layers with “X-ray vision“ shows great promise in answering stratigraphic ambiguities, complimenting digital microscopy conducted in the field. In addition, we collected Munsell color designations for each pXRF analysis location so that we could compare major elemental levels with pigment color and value. We were also able to confirm suspected gunshot damage at a rock art site. These results highlight the advantages of this non-destructive technique.<br/>

Discovering hidden layers with X-ray vision: New applications of pXRF to rock art studies

2019 Spring National Meeting

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